Planter box



FIG. 1 is a perspective view of a planter box showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a front elevational view thereof, the side opposite being identical;

FIG. 4 is a bottom plan view thereof; and

FIG. 5 is an enlarged end elevational view thereof, the end opposite being identical. 

The ornamental design for a planter box, as shown and described. 